R4 card the save data could not be accessed .

[DS] Cannot access save data fix. Some cards like the R4 and a few other cards have trouble running certain games,
With the exception of one game "Star Wars Jedi Alliance" All games can be fixed to work on these lower qaulity cards.


So why is it broken?
Basicly at some point during development nintendo changed the way save files are handled, saves are handled by a file inside all ds roms called "arm7.bin", older cards such as the R4 and others have no way of reading or using this updated arm7, so the solution is to swap the newer arm7 with an older arm7 taken from a working game.

This is refered to as an arm7 patch, swap or fix.


So how do i fix it?
First of all just try update your cards firmware. Firmwares for all cards


If that doesnt work there are a few programs out there that you can use to arm7 swap, DSlazy and DSbuff.
DSbuff being a more up to date program.


DSbuff v.1 Final link: DSbuff

Extract with 7zip, winrar or winzip: 7 Zip

Pre extracted arm7.bin from Contra 4: arm7.bin
If you download the arm7.bin put it in the folder you create in step one then you can skip step 2 completly.


NOTE: If DSbuff doesnt work properly on your computer *for example the program crashes during the arm7 swap follow this guide for DSlazy* DSlazy links and guide


DSBuff Instructions:

Step one: Set-Up
Create a folder on your desktop and name it the game you want to fix.
Extract DSbuff anywhere and start it.

Step two: Unpacking
Run DSbuff.exe and click browse now chooseR4 card the save data could not be accessed . - dsbuffunpack.png that works.
Click unpack R4 card the save data could not be accessed . - dsbuffbrowse.pngds/images/dsbuffunpack.png" alt="dsbuffunpack.png" class="h_mi" /> then browse in the new drop dowR4 card the save data could not be accessed . - dsbuffunpack2.pnghoose the folder you created on your desktop
Click "Unpack Checked" and make it so only Arm7 has a tick.
Now click arm7 swap.
Click on arm7 then browse and choose arm7.bin from your folder you created. Now click
Watch the green line to see when its done, it will unpack, then repack then when its finished give you the option of what to name the file.

Congratulations your finished, enjoy your game.

Thanks. It worked

I'm playing pokemon platinum on a emulator on my pc and is sas: save data could not be accessed or somthing. what can i do??

I dont have a memory card for my ds so how do i get the software upgrades or whatever onto it because i have the error 'could not read data' when i try and load up professor layton and pandoras box?

I cant load save data i downloaded of the net on to my r4 card when i play the game it doesnt load the data i want like on pokemon platinum it says ill have all 3 starter pokemon but it doesnt load how do i load some one elses save data ?

I think the file you d/l had a save file that the uploader put in by accident. I had the same thing happen to me. Just try and d/l from somewhere else that should solve the problem. If not pls post.

Every time i try to play my DSI Action replay i try to play pokemon platinum,pearl,ect but when i try to play the game it says the saved data can not be accesse wht can i do